Automobile-alarm.



E. UOPLESTON. AUTOMOBILE ALARM. A'PPLIOATION FILED MAR. 2a, 1908.

b m mi-W3 4 Patented Apr. 6, 1909.

Wine 58m EDWIN GOPLESTON, OF

TON AND ONE-FOURTH TO AUTOMOBILE- ALARM.

Specification of Letters Patent.

- Patented April 6, 1909.

Application filed March 28, 1908. Serial No. 423,811.

To all whom it may concern.-

Be it known that I, EDWIN CoPLEsToN, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements 1n Automobile-Alarms, of which the following is a specification.

My, invention relates-t0 alarm devices, for use on motor vehicles, of the type in which a pipe or whistle is sounded by means of the exhaust gases from the engine of the vehicle.

The object of the invention is to produce an alarm device which shall be simple'a'nd inexpensive in construction, which may be applied to an automobile without in any way altering the exhaust passages and without imposing any appreciable back-pressure on the exhaust, and which will not become clogged with soot or other solid matter.

To the above ends the invention consists in the automobile alarm hereinafter described, as defined in the following claims.

In the drawings, Figure 1 is a vertical section of a device embodying the invention,-

showing the whistle inoperative position, and Fig. 2 is a rear elevation, showing the whistle in inoperative position. 4

The illustrated emllodiment' of the invention comprises a musical pipe or whistle in the form of a tube 1 which is closed at its lower end and open at its upper end. Near the upper end is a vent 2 terminating in a lip 3 over which the exhaust gases passin sounding the whistle. Arms 4 and 5 on the upper end of the whistle arepivoted upon a collar- 6 which is adjustably secured, by means of a set-screw 8, upon the exhaust outlet? of the automobile motor. Arm 5 is extended upward and connected with a wire 9 which extends to any point where it may be conveniently reached by the operator of the vehicle.

The whistle hangs normally. in vertical position below the exhaust outlet, as shown in Fig. 2, being, in this position, entirely clear of the current of'exhaust gases flowing from the outlet. To sound the whistle the operator ulls the wire 9, thereby swinging the whist e into an inclined position, asin Fig. 1. In this position the upper end of the tube intercepts a portion of the stream of exhaust gases, which enters the tube and issues, with substantially unimpaired velocity, through the vent and over the lip, thereby sounding the whistle. By raising the Whistle, in

greater or less sounded more or extent, the whistle may be less loudly, according to the amount of exhaust intercepted, and the" pitch of the note also varies at the same time, eing higher in proportion to the amount of exhaust.

When the wire 9 is released by the operator the whistle swings downward into inoperative position by its own weight.

To avoid the collection of water in the whistle a small outlet 10 is bored in the bottom of the tube.

Although the Whistle intercepts a portion of the exhaust, it does not oppose any appreciable resistance to the flow thereof, but the exhaust is merely deflected somewhat from its normal path,and the whistle depends for its operation on the velocity rather than on the pressure of the exhaust. This manner of supplying the whistle with exhaust gas not only obviates the necessity of making any branch connection on the exhaust pipe, but it also does away entirely with the valve usually employed with alarms sounded by the cxhaust, so that the construction of the device is substantially simplified.

In musical pipes or Whistles of the type which I employ it is usually necessary to pro vide a passage terminating in a narrow orifice through which the gas or air is directed against the lip of the whistle. This construction is disadvantageous in an alarm sounded by exhaust gases, as the passage and the slit tend to become clogged by soot and other solid matter in the exhaust. In my whistle I do not use such a passage and orifice,

BROOKLYN, NEW YORK, ASSIGNOR Oh ONE-FOURTH TO LEON OOPLES I HAROLD GOPLESTON, OF ROCKAWAY BEACH, NEW YORK.

the manner described, to a but leave the-mouth of the whistle wide open,

of position to intercept and be sounded by drawings, within the nature and sco e of the (tie pivotally mounted near the outlet and invention as it is defined in the f ollowing having an o ening adjacent thereto to reclaims. ceive the e aust, and manually-operable I claim: means for swinging the Whistle into position 1. An alarm device having, in combination to cause it to intercept and be sounded b a with the exhaust outlet of an tle having an opening to receive the exhaust, cape from the flow from the outlet. to intercept and be sounded by a portion of 5. An l a armdevice having, in combination t e stream of exhaust flowing from the outj with the exhaust outlet of an engine, a whis let Without substantially obstructing the 1 tie comprisin a tube with an open end, and flow from the outlet. lnieans for ho ding the tube in 2. An alarm device'having, in combination with the exhaust outlet of an engine, a Whi tle having an opening toreceive the exhaust,

' withoutconstricting the outlet.

6. An alarm device having, in combination with the exhaust outlet of an engine, a whistle having an opening to receive the exhaust, and moving the out of a position in which it is out of contact with the exhaust outlet while its inlet opening intercepts a portion of the stream of exhaust after its emission from the exhaust outlet.

In testimony whereof, I aflix my signature presence of two witnesses.

a portion of the stream of exhaust flowing from l the outlet, without substantially obstructing the flow from the outlet.- alarm device having, in combination with the exhaust outlet of an engine, a whis tle comprising an open-ended tube with a a lip near the open end, and means for holding the whistle in position to cause a I portion of the exhaust to impinge at an angle l against the inner siliface of the tube on the in s1de upon which the vent and the lip are 10- j EDWIN COPLESTON. cated. Witnesses:

4. An alarm device having, in combination Enwnv L. SCHNOR, with the exhaust outlet of an engine, a whis- GEO. A. RILEY.

whistle into and 

